This stock has averaged annual gains of nearly 24% over the past decade -- and its future is bright, too.I'm invested in several healthcare stocks, and the one that I'm most excited about is Intuitive Surgical (ISRG -3.19%). The stock is down 15.5% year to date as I write this, making it more attractively priced than it was last year.It's a major specialist in robotic surgery equipment, boasting more than 16 million procedures performed on its equipment and more than 9,900 machines installed in hospitals ar ...